Cutter-head.



A. B. LANDIS.

Patented Feb. 20, 1912.-

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CUTTER HEAD. APPLICATION. IILBD My; 18, '1910.

Paten te d Feb. 20, 1912.

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:GUTTE'R HEAD. I APPLICATION I'Iinn'nu 1a, 1 10.

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- CUTTER HEAD; APPLICATION FILED MAY 18, 1910'.

1,017,892, Patented Feb. 20,1912.

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"- ter-He'ads, of which the following is a spec edge broken away UMTEDSTATES 1 PATENT one-1on ABRAHAM B. mp1s,

CUTTER-HEAD.

.To all whom it may concern:

.,Be it known that I, ABRAHA B. LANDI'B, a citizen of the United States,residing at Waynesboro, in the county'of Fran and State of Pennsylvania,tain new and useful Improvements in Outfication.

My said invention wnsists invarious im provementsin thedetails ofconstruction of cutter-heads for use on bolt-cutting machines, whichrigid manner and adapted to be quickly andwhereby such ahead is providedin the cutter-holders are supported in -a easily operated to open andclose the die, and the head as a whole is made comparatively short andcompact, and the angle of the cutter may be readily adjusted to cut anypitch of thread required, all as .will be hereinafter more fullydescribed and claimed.

Refer-ring 'to the accompanyin drawings, which are made a part hereofand on which similar reference characters indicate similar parts, Figure1 isa face view, vation, of a cutter-head embodying my sai invention,Fig. 2 a rearelevation with one showing a feature of internalconstruct-ion more clearly, Fig. 3 a side elevation with one broken awayto show construction more clearly, longitudinal section on the dottedline ai-at in Fig. 1, Fig. 5 an outside view of'one'o thecutter-holders, Fig.6 aside elevation of one of the same, Fig. 7 anunderside plan of the same, Fig. 8 a detail section on the dotted line88 in Fig. '5, Fig. 9 an end elevation, Fig. 10 an end and sideelevation of one of the securing and adjusting cylinders. Figs. 11 and12 details illustrating the locking means, Figs. 13, 14 and 15 viewssimilar to Figs. 1, 6 and a feature of internal Fig. & a detail theportionsmarked .B the cutter-holders are mounted cylinders 2 formed witheccenthe main body tric bearings 1 near their outer ends and with atoothed section 3 at their inner-ends. The extreme outer ends 4 areconcentric with 2, as'most clearly indicate Specification of LettersPatent. Application filed May 1a,- 1910. Serial No. 562,017.

,bo'dy. ismounteda sliding ring have invented cor-- or front eled-' bodyand its other end, 7, engages'with a portion of the casing 7illustrating a modified.

or WAYNESBORO, PENNSYLVANIA.

Patented Feb. 20, 1912.

4 and 9. On the rear end A formed with a circumferential groove a withwhich a shifting fork (not shown)-'may engagefor adjusting the sameback, and iorthm the usual manner. Said collar is secured on the rearendot spline a. A ring A? is body adjacent to he collar A'and is seecured thereto by a pin a. seated in a perforation in said collar A .andformed with a conical outer end,"

in Figs.

tion a in sai ring A. .For a short distance adjoining conical pointstarting a short, distance from said face, so that when the parts are inthe engagement shown in Fig. 11 the portion of the pin' will engage withthe straight sides fthe perforation a and hold the parts lockedtogether. A 'coiled spring 5 engages at one end, 6,-with a-p'erforationin the ring A extending'entirely around the perforation in the adjacentend of the body A, the tension of the spring being such as to operate toturn rin A a short distance independent o-f said od'y. A is mounted onsaid body with its rear portion overlapping a shoulder in the ring A andits forward' portion being formed f with internalteeth which engage-thegear.

teeth 3 of the several cylinders 2. A. screw 8 is mounted in atangential socket inone side of semi rmg A. wlth its threads engagingwith a worm-gear in the periphery of the shoulder of the ring A, rings Aand A together but providing a means for atircumferential adjustment ofone in relation to the other.

The cutter-holders B comprise arms of a form best illustrated inFigs. 5,6 and? one end being formedwith foraiionwhich is adapted to outer, end.1,01 one of-the' cylinders) and the'inner' end of which fits over astudthe purpose on the bearing 9. formed for Said. bearings 9 are faceof the body A.

located eqni-distant around the axis of said body and are formed hollow,the cylinders 2 being mounted within said bearings. 'Said holders B areof sufficient length to extend across the head, as best shown In Fig. 1,and each is formed with an aperture at right angles with the axis of itspivot and add jacent to the hub or hearing on which it is of the I saidbody by means of a mounted on said.

(see Figs..11 and 12) which is adapted to engage with a perforathe; faceof collar A said pin'is formed with straight sides, the taper of its.

straight Another ring thus securing said a hub having a per- 7 I fitover the mounted. Theouter end of each holder is narrowed in widthsufficiently .to extend through the aperture of the holder which ex- 1tends across the head at right angles thereto and on the opposite sidethereof. Thus the four holders B, as shown in Fig. l, are allinter-locked the outer end of each one extending through the aperture inthe oppo-- site holder adjacent to. the'bearing thereof. Each of saidholders is formed on its inner.

face near its outerend with a seat in which.

ismounted a blockvB containing a seat for its cutter. Said blocks B aresecured to the main part. of the cutter-holder D by means of a key b" inthe form of a segment of a circle, which is mounted in correspondingsegmental groove in the ad acent face of eachof the parts B and B, asshown most holder Bis somewhat deeper than thewidth of keyib and saidkey is formed with a .co n icalseat in its outer edge with which thepoint of'a conical pointed screw b is adapted to engage, the screw beingmounted in the part B and its conical point adapted to bear against theouterangle, orface, ofthe conical seat in said key and force the sameoutwardly-into the groove. The forcing of saidscrew against said taperedface will operate, therefore, to force said hey outwardly and draw theblock B with it,

v clamping said block tightly against the adjacent' face of the part B.Said block is secured and adjusted transversely by a set screw I)mounted in a transyerse perforation in the holder B, the head of saidscrew being adapted to engage with a groove in the outer. face of theblock-B near its extreme 'outer end. A scale is preferably formed on theend of block B. and an indicator mark p on the adjacent'part B to-.determine the degree of angle and adjustment.' By this means, as willbe readily seen, the block B maybe adjusted to any angle desired inrelation to the axis of the -utter-head by loosening the clamping screw6'' and adjusting the securing screw as pitch of thread desired, insteadof requiring just described. and a single cutter-holder is thus adaptedto holda cutter to secure any a change of holders as in otherconstructions of heads in common use.

Each of ihc'cutters C is of a form illustra ed in applicationsheretofore filed by me (for example, #544,089 filed February 4, 1910)and are mounted in theEseats in the blocks B by an inter-locking flangeand groove at the outer corner of said block and cutter, respectively,mounted in a perforation in said block alongside the inner edge of saidcutter, said cylinder being provided with a handle 0' for turning thesame to clamp said cutter in position, or the cylinder may beformed tobe operated by'a screw-driver, as shown in my application No. 554,775. 2

In adjusting the die for difl 'erent sizes of work the ring A is turnedon ring A by means of a screw 8 until the adjustment g desired issecured which may be determined by a scale s on the peripheryof saidring A and an indicator mark 2' on the adjacent periphery of the ring AThev turning of said ring A operates through the gear connection withthe cylinders 2 to turn said cylinders the eccentric bearings of whichen-- gage with bearing blocks. b-on. the outer ends of the adjacentcutter-holders and serve to furnisha support for said ends and a meansfor adjusting them out and in, As .the'ring A turns, the-cutter-holdersB anda cam cylinder 0 are rocked on the bearings .consisting'of the' Istud-bearing 9 on the body and the outer end, 4, of the cylinders 2swinging the opposite ends of said cutter-holders around the axis ofsaid pivots to open andclose thedie.

The cutters are mounted, as best shown in Figs. 1, '6 and 13, with thecutting end extending toward the pivoted end of the holders. The outerends of the cutters extend beyond the outer ends of said holders and areadapted to be adjusted longitudinallyand held against end thrust by.screwthreaded rings on a screw C which engage with transverse groovesin\ the back of the cutter and with screw-threads in a longi- 'tudinalseat in the holders B which cut into;

the seat for said cutter in the same manner see especially Fig. 13) asshown and described in other applications heretofore filed by me, I

A longitudinal perforation is formed in each cutter-holder extendingfrom its outer end into the aperture adjacent to its hub the outer endof which is filled'with a screw-plug b and the inner end of which isprovided with aplunger 6 a coiled spring b being interposed between saidplunger and said screw-plug which normally presses said plunger againstthe face of the adjacent cutter and thus tends to force said cutterandthe cutter-holder carrying it outward to keep the bearingplug I) pressedinto engagement with the eccentric bearing 1 of the cylinder 2. Thus,immediately upon the turning of said cylinders 2 to carry said eccentricbearings outward the spring I) will expand, forcing the cutter-holdersoutward on their pivots to they occupy when mparts being held in open,the die, while the turning of said cylinders in the reverse directionoperates to return the cutter-holders to theposition the die is closed,comressing the springs 5 Thus, while the cutter-holders are at all timesheld under a fixed and rigid support they are held by spring pressureagainst said supports and no vibration or'rattle is .thus permitted, the

By the swinging times.

holders outwardly to ad us an indicator point 0 on the casing alongsideturning cyhn and indicator,

ferent, sizes of ment will be necessary in closed relation at all of thecuttert the die for difwork, the'points of the cut-- to the axis orderto securethe best results. For this purpose I. have designed a gageconslst-mg of a; casing, or

frame, 20 provided with flugs, orpins, 21 which are adapted to beinserted in perforations 22 in the sideof the cutter-holder B alongsidethe edge of the cutters C- In said casing 20 is mounted a cylinder 23the outer endof which is formed with a flange 24 the inner faceof saidflange being-adapted to extend .across the front end' of the oint of thecutter-holder rally tapered.

and formed spi- On therearend said .cy'linder is provided witha knurlednut 25 with a. scale 26' alongside its knurled portion and of saidscale. By determined by the scale der 23, as the inner face of flange 24may be set to deterthe cutters for any size of work mine the. positionof the cutting points 0 desired.

The cutters -are set to the position thus determined by turning thescrew C in the well known manner. In work-of one p tch to work changingfrom of another pitch the angle of the cutter may be adjusted asrequired by the means above described.

In operation, the position,- as shown in Flg the cutting reaches ment,the collar A is slid arts being in operative s. 1 and 3, when the limitof the moveautomatic'ally by the automatic operating mechanism of theins a in the collar A with the socket n in the r machine (not shown) torelease the locking from engagement in'g A". As soon as the parts aredisengaged spring expands to turn ring engagement with the cylinders A.which, through its 2 turn the cylinders carrying the eccentric'bearings1 outward and expand and open the die.

by the automatic permitting the springs b. to

'hen the work the die is again mechanism (not shown) and the operationrepeated.

The modified for-m shown in Figs. .13, l-t

angular adjusting, block B Having thus fully descr ibed my said in-.vention, what I claim as new and desire to secure by Letters Patent,is:

1. A cutter-head comprising a body having' journals for thecuttersholders arrang aroundits'axis, cutter-holders comprising armsadapted to extend'across the face of the head mounted.- on said journalsatone end and carrying the cutters onthe inner face of their, oppositeends, said cutters being arranged with their cutting points" adjacent tothe axis of the head, and means for opening andclosing the die,substantially as set forth. 2, A cutter-hea d comprising a body,butter-holders pivoted on said body, each cut ter holder beingpivoted'at one side of said body and extending -across the face thereofto the opposite side, means for supporting and adjusting said ends,cutters mounte on the inner face of said out'er ends with their" cuttingpoints adjacent to the axisof the head, and means'for opening andclosing the .die, substantially as set forth. 3.- A cutter-headcomprising a body; cutter-holders each of which is pivoted at one endon-one side of the head -'and of a lengthto extend across the axis ofsaid head to near the opposite side thereof, the outer or swinging endof each cutter holder extend ing throng 1 a transverse aperture formedadjacent to the pivot in the-opposite holder, means for. supporting andadjusting. said outer .e'nds, cutters carried on the inner face. of saidouter ends, and ineans for opening and closing the die, substantially asset. forth. 4, A cutter-head comprising a body, cutter-holders each ofwhich is pivoted at one end on one side of said body, each cutterholderbeingfornied to extend across the axis of the head and swing o'nits)ivot and also with atransverse 'apertur a jacentl to its pivot theouter'endof' each holder berng mounted to extend through;, in theopposite holder, means for supporting and adjusting the outer nds'ofsaid cutterto open andclose' the die, and cutters carried on the inner;face of with their cutting points adjacent to the axis of thefbead,substantially as set forth. 5. A cutter-head comprising ter-holderspivoted on journals around the. axis of said body, each cutter-holderbeing formed to extend from its pivot acrossto the opposite side of thehead, rocking cylinders mounted within journals of each cutterholder andformed with eccentric hearings on their outer ends which enga e with theswinging or outer ends of the adjacent cutsame, spring plungers mountedin sockets in each cutter-holder and adapted to bear againstthe adjacentface of the cutter holder'which extends through the aperture holders,means. for swinging said outer endssaid outer ends a body,cutter-holders for supporting and adjusting the meansconnecting saidseveral cylinders forsecuring and operating them simultaneously,eccentric hearings on the outer ends of said ends of the rockingcylinders,

cylinders,

therein to hold it outwardly against said ec-' centric bearing, andmeans securing said cylinder to open and close the die,substantially .asset forth. I

.6. A cutter-head comprising a formed with projecting hollow journalsarranged equi-distant around its axis, rocking cylinders for rocking andmounted in said hollow journals,

cutter.- holders pivoted on said bearings each cutter-holder beingformed to extend across the head to a point adjacent to. the eccentricbearing of thecylinder on the opposite side of the head, a bearingconnection between said eccentric-bearing and the outer end of saidcutter-holder, a spring plunger mounted in a longitudinal socket in eachcutter-gholder and projecting to within the aperture therein to bearagainst the adjacent face'of the cutter carried on said cutter-holder,

and the cutter carried on the inner face of each cutter-holder,substantially as setforth.

- 7. A cutter-head comprising a body, out

ter-holde'rs'pivoted' on one side thereof and extending across the axisof the head to its opposite side,

cutters carried on the inner face of each cutter-holder with theirpoints adjacent'to the axis of the head and means for securing saidcutter-holders and means for adjusting said cutters to open and closethe dig-substantially as set forth,

8. A cutter-head comprising a body, cutter-holders pivoted around theaxis on the face of said body, each cutter-holder extending across theaxis of said head andthrough 'an aperture in the cutter-holder on theopposite side extending at right angles therewith, cutters on the innerfaces of the outer v ends'o'f said cutter-holders, eccentric supportsfor the outer ends of said cutter-holders, spring-pressed plungers forforcing said outer ends into engagement with said eccentric supports andmeans for operating said eccentric supports to open and close the die,and means'for'sec uring the parts in fixed position, substantially asset forth.

9. A cutter-head comprising a body, cutter-holders on said body, cutterscarried on said cutter-holders, means for adjusting and securing theparts, each of said cutter-holders being the head pivoted on one side ofthe axis of extending across said axis to the opposite side through anaperture ,in the cutter-holder mounted on said opposite side at rightangles therewith, set forth.

substantially as cutter-head comprising a body formed with stud-journalson its face ranged at equi-distant points around its axis,'rocl ringcylinders mounted in perforations in said ournals and formed witheotreme outer ends concentric with the main 11. Acutter-head comprisinga body, cutter-holders pivoted at one end on'on'e side 0 said body andextending across the axis of the head at right angles with each other,rocking cylinders in the journal of each cutter-holder provided with anQeccentrlc bearing adapted 'to engage with the outer end of I v the;adjacent cutter-holder, and means for operating and securing saidrocking cylinders, substantially as set forth.

12,. A cutter-head omprising 'a' cutterholder, a cutter-carrying blockmounted, on I said cutter-holder in tangential relation to-a circlearound the axis of the head, a cutter on said block, means for'swingingand adjusting said block, and means for adjustingsaid cutter,substantially as set forth.

13. A cutter-head comprising a ter-holders mounted on said body, blocksmounted on said cutter-holders, means for swinging "and securing saidblocks on lines tangent acircle around the axis of the head, cuttersmounted. on said blocks, and means for securing and adjusting saidcutters, substantially as set forth.

14. A cutter-head comprising a body, outterholders pivoted around theaxis of sai body and extending axis to the other, blocks mounted on saidcutter-holders with their inner ends adjacent-to the axis and theirouter ends extending toward the free end of said cutter-holders, meansfor swinging the outer ends 0 said blocks 'onlines tangent to a circlearound said axis, and the cutters mounted on said blocks,substantially-as set forth,

from one side of the.

body, cut- In witness whereof,I, have hereunto set

